opengl 球纹理旋转源代码
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#include <windows.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <gl/glaux.h>
#include <stdio.h>
#include <io.h>
HWND hWnd;
HDC hDC;
HGLRC hRC=NULL; //定义渲染环境
HINSTANCE hInstance; //得到程序的例子
RECT rect;
int sw = 640;
int sh = 480;
bool fullscreen = 1;
GLfloat aspect;
GLfloat xrot; // X轴旋转 ( 新 )
GLfloat yrot; // Y轴旋转 ( 新 )
GLfloat zrot; // Z轴旋转 ( 新 )
GLuint texture[1]; //纹理的存储空间 ( 新 )
#pragma comment( lib, "opengl32.lib" ) // 链接时使用OpenGL32.lib
#pragma comment( lib, "glu32.lib" ) // 链接时使用GLu32.lib
#pragma comment( lib, "glaux.lib" ) // 链接时使用GLaux.lib
AUX_RGBImageRec *LoadBMP(char *Filename) // 读取位图图象
{
FILE *File=NULL; // 文件句柄
if (!Filename) // 确定文件名已给出
{
return NULL; // 如果文件名未给出则返回NULL
}
File=fopen(Filename,"r"); // 检测文件是否存在
if (File) // 文件是否存在?
{
fclose(File); // 关闭文件
return auxDIBImageLoad(Filename); // 读取位图并返回一个指针
}
return NULL; //如果调用文件失败则返回NULL
}
int LoadGLTextures() //调用Bitmap并转换成纹理
{
int Status=FALSE; //状态确定
AUX_RGBImageRec *TextureImage[1]; //为纹理创建存储空间
memset(TextureImage,0,sizeof(void *)*1); //将指针设为NULL
//读取位图，检查错误。如果位图不存在则退出
if (TextureImage[0]=LoadBMP("Data/TX.bmp"))
{
Status=TRUE; //设Status为TRUE
glGenTextures(1, &texture[0]); //创建纹理
//用位图中的数据进行典型的纹理生成
glBindTexture(GL_TEXTURE_2D, texture[0]);
glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
}
if (TextureImage[0]) //纹理是否存在
{
if (TextureImage[0]->data) //纹理图象是否存在
{
free(TextureImage[0]->data); //释放纹理图象所占用内存
}
free(TextureImage[0]); //释放图象结构
}
return Status; //返回Status的值
}
void SceneInit(int w, int h)
{
LoadGLTextures();
glEnable(GL_TEXTURE_2D);
glShadeModel(GL_SMOOTH); //允许平滑着色
glClearColor( 0.0, 0.0, 0.0, 0.5 );
glClearDepth(1.0f); //设置深度缓冲区
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL); //深度测试的类型
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
void SceneResizeViewport(GLsizei w, GLsizei h)
{
if(h==0)
{
h=1;
}
aspect = (GLfloat)w/(GLfloat)h;
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION); //选择投影矩阵
glLoadIdentity();
gluPerspective( 45.0f, aspect, 0.1f, 100.0f );
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void SceneShow(GLvoid) //这里进行所有的绘图工作
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //清屏和清除深度缓冲区
glLoadIdentity(); //重置当前Modelview矩阵
glTranslatef(0.0f,0.0f,-5.0f);
glRotatef(xrot,1.0f,0.0f,0.0f);
glRotatef(yrot,0.0f,1.0f,0.0f);
glRotatef(zrot,0.0f,0.0f,1.0f);
//glBindTexture(GL_TEXTURE_2D, texture[0]);
glBegin(GL_QUADS);
GLUquadricObj *quadObj = gluNewQuadric();//创建一个二次曲面物体
gluQuadricTexture(quadObj,GL_TRUE); //启用该二次曲面的纹理
glBindTexture(GL_TEXTURE_2D, texture[0]);//绑定纹理
gluSphere(quadObj,1,20,20); //画圆
gluDeleteQuadric(quadObj);
glEnd();
xrot+=0.3f;
yrot+=0.2f;
zrot+=0.4f;
}
void EnableOpenGL()
{
PIXELFORMATDESCRIPTOR pfd;
int iFormat;
hDC = GetDC( hWnd );
ZeroMemory( &pfd, sizeof( pfd ) );
pfd.nSize = sizeof( pfd );
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL |
PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 16;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
iFormat = ChoosePixelFormat( hDC, &pfd );
SetPixelFormat( hDC, iFormat, &pfd );
hRC = wglCreateContext( hDC );
wglMakeCurrent( hDC, hRC );
}
// 取消 OpenGL
void DisableOpenGL()
{
wglMakeCurrent( NULL, NULL );
wglDeleteContext( hRC );
ReleaseDC( hWnd, hDC );
}
bool ChangeResolution(int w, int h, int bitdepth)
{
DEVMODE devMode;
int modeSwitch;
int closeMode = 0;
EnumDisplaySettings(NULL, closeMode, &devMode);
devMode.dmBitsPerPel = bitdepth;
devMode.dmPelsWidth = w;
devMode.dmPelsHeight = h;
devMode.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
modeSwitch = ChangeDisplaySettings(&devMode, CDS_FULLSCREEN);
if(modeSwitch == DISP_CHANGE_SUCCESSFUL)
{
return true;
}
else
{
ChangeDisplaySettings(NULL, 0);
return false;
}
}
LRESULT CALLBACK WndProc( HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam )
{
switch ( message )
{
case WM_CREATE:
GetWindowRect(hWnd, &rect);
sw = rect.right - rect.left;
sh = rect.bottom - rect.top;
SceneResizeViewport(sw, sh);
return 0;
case WM_SIZE:
if(!fullscreen)
{
GetWindowRect(hWnd, &rect);
sw = rect.right - rect.left;
sh = rect.bottom - rect.top;
if(sw>0 && sh>0)
SceneResizeViewport(sw, sh);
}
else
{
SceneResizeViewport(GetSystemMetrics( SM_CXSCREEN ),
GetSystemMetrics( SM_CYSCREEN ));
}
return 0;
case WM_CLOSE:
ShowWindow (hWnd, SW_HIDE);
PostQuitMessage( 0 );
return 0;
case WM_DESTROY:
return 0;
case WM_KEYDOWN:
switch( wParam )
{
case VK_ESCAPE:
PostMessage(hWnd, WM_CLOSE, 0, 0);
break;
}
return 0;
default:
return DefWindowProc( hWnd,message, wParam, lParam );
}
}
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
WNDCLASS wc;
MSG msg;
bool bQuit = false;
if (MessageBox(NULL,"是否选择全屏显示模式?", "全屏方式运行?",MB_YESNO|MB_ICONQUESTION)==IDNO)
{
fullscreen=0; //窗口模式
}
wc.style = CS_OWNDC;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon( NULL, IDI_APPLICATION );
wc.hCursor = LoadCursor( NULL, IDC_ARROW );
wc.hbrBackground = (HBRUSH)GetStockObject( BLACK_BRUSH );
wc.lpszMenuName = NULL;
wc.lpszClassName = "Name";
RegisterClass( &wc );
if(fullscreen)
{
ChangeResolution(640, 480, 16);
hWnd = CreateWindow(
"Name",
"Lesson1",
WS_POPUP | WS_CLIPSIBLINGS | WS_VISIBLE,
0, 0,
GetSystemMetrics( SM_CXSCREEN ),
GetSystemMetrics( SM_CYSCREEN ),
NULL, NULL,
hInstance,
NULL );
}else
{
hWnd = CreateWindow(
"Name",
"Lesson1",
WS_TILEDWINDOW | WS_VISIBLE,
GetSystemMetrics( SM_CXSCREEN )/2-sw/2,
GetSystemMetrics( SM_CYSCREEN )/2-sh/2,
sw,
sh,
NULL, NULL,
hInstance,
NULL );
ChangeDisplaySettings(NULL, 0);
}
ShowWindow(hWnd, SW_SHOW);
UpdateWindow(hWnd);
//Initialisation
EnableOpenGL();
SceneInit(sw, sh);
if(!fullscreen)
{
GetWindowRect(hWnd, &rect);
sw = rect.right - rect.left;
sh = rect.bottom - rect.top;
if(sw>0 && sh>0)
SceneResizeViewport(sw, sh);
}
else
{
SceneResizeViewport(GetSystemMetrics( SM_CXSCREEN ),
GetSystemMetrics( SM_CYSCREEN ));
}
while ( !bQuit )
{
if ( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
if ( msg.message == WM_QUIT )
bQuit = true;
else
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
{
// OpenGL 动画
SceneShow();
SwapBuffers(hDC);
}
}
//关闭，退出程序
DisableOpenGL();
ShowWindow (hWnd, SW_HIDE);
DestroyWindow( hWnd );
ChangeDisplaySettings(NULL, 0);
return msg.wParam;
return 0;
}
